La motte c



(No Model.)

LA M'OTTE-G. ATWOOD.

- ELECTRIC BRAKE.

No. 464,002. Patented Dec. 1, 1891.

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: in unmmlmuna NITED STATES PATENT OFFICE.

LA MOTTE C. A'IIVCOD, OF ST. LOUIS, MISSOURI, ASSIGNOR TO THE ATWOQD ELECTRIC COMPANY, OF SAME PLACE.

ELECTRIC BRAKE.

SPECIFICATION formingpart of Letters Patent No. 464,002, dated December 1, 1891.

Application filed February 27, 1891. Serial No. 383,119. (No model.)

. a To all whom it may concern.- primary movement to the parts by the use of Be it known that I, LA MOTTE C. ATWOOD, the magnet 16 and a powerful final move of the city of St. Louis, in the State of Misment to the parts by the use of the magnet souri, have invented a certain new and use- 14, the core of which is connected to the exful Improvement in Electric Brakes, of which treme end of the lever 8. It is evident that the following is a full, clear, and exact dethe chain 7 might be connected directly to scription, reference being had to the accomthe lever 8, and the shaft 10 with its pinion panying drawings, forming part of this speci- 11 and the segment 12 be dispensed with; but fication. I prefer to use these parts, as a corresponding to The object of my invention is to produce a movement of the lever will cause a greater simple and reliable brake intended more parmovement to the brake-shoes with than withticularly for street-cars; and it consists in out these parts. features of novelty hereinafter fully de- I claim as my invention scribed, and pointed out in the claims. 1. In an electric brake, the combination of 15 Figure I is a top or plan view illustrative the shoes, a rock-shaft to which the shoes are of my invention, and Fig. II is an elevation connected, a pivoted lever connected to the f th operating parts. rock-shaft, and two independent magnets 10- Referring to the drawings, 1 represents cated at different distances from the pivoted two of the wheels of the truck of the car; 2, lever and operating successively formoving 20 the brake-shoes; 3, the rock-shaft connected, the lever at different stages, substantially as as usual, to the shoes by means of a lever 4 and for the purpose set forth. and links 5; 6, a crank on the shaft, and 7. 2. In an electric brake, the combination of the bl.ake chain the shoes, a rock-shaft to which the shoes are 8 represents the main lever of the brake, connected, a lever connected to the rock- 25 pivoted at 9, and in which is journaled a shaft, a magnet 14, having a core 13 secured short shaft 10, to which is connected one end to the end of the lever, and a magnet 16, havof the chain '7. On one end of the shaft 10 ing a core 15 secured to the lever between its is a pinion 11, which engages a fixed rackend and its pivot by means of a link 17, subsegment 12. To the upper end of the lever S stantially as set forth.

0 is connected the core 13 of the magnet 14, In an electric brake, the combination of and lower down on the lever there is conthe shoes, a rock-shaft to which the shoes are nected the core 15 of a magnet 16, this conconnected, a pivoted lever, a fixed rack-segnection being made by means of a link 17. ment, ashatt provided with a pinion engag- I have shown a double magnet 16 and a single ing said segment, a chain connecting said 5 magnet 14; but it is evident that the magnet shafts, and a magnet for moving the lever, 14 may be duplicated or increased to any desubstantially as and for the purpose set forth. sired number. 4. In an electric brake, the combination of The operation is as follows: Vhen the the shoes, the rock-shaft, and a pivoted lever, brake is to be applied, the first part of the a fixed rack-segment, ashaft journaled in the 40 movement of the lever S is caused by the lever, a chain connectingsaid shafts, a pinion o magnet 16, and as the lever is moved the shaft on the lever-shaft engaging said segment, a 10 is turned, winding the chain 7 thereon, magnet 16 and core 15, connected by ali'nk 17 the turning of the shaft being caused by the to said lever, and a magnet 14, having a core pinion 10 meshing into the teeth of the fixed 13 connected to said lever, substantially as 5 segment 12. By the time the greatestamount and for the purpose set forth.

of pressure is desired the ma net 16 will have 1 moved the core 13 well into the magnet 14, I LA M-OTrlE AlWOOD- and the lever will then be moved by the ma In presence of net 14 to apply the final pressure of the shoes E. S. KNIGHT,

' 50 upon the wheel. In this way I get a rapid A. M. EBERsoLE. 

